"Nasser M. Abbasi" <nma@12000.org> wrote in message news:k9apgr$n9d$1@speranza.aioe.org...> On 11/30/2012 11:09 AM, Nasser M. Abbasi wrote:>> On 11/30/2012 10:48 AM, Genevieve Masson wrote:>>> Hi :)>>>>>> How to avoid that type of answer (i mean how to evaluate the fractions) >>> :>>>>>>>> Vg2>>>>>> Vg2 =>>>>>> acos(5784835530832562/5514948135819145 - >>> (18014398509481984*((3937*sin(thCerc))/20000 - AE*sin(alpha))^2)>>>>>>>> First you need numbers for those symbols you have there: thCerc,AE,alpha >> etc...>> use subs().>> Then you should be able to just use double() around the whole thing.>>>> Also, you can try simplify on the symbolic expression. It helped>> EDU>> syms thCerc AE alpha> EDU>> VG2=... what you had above...> EDU>> simplify(VG2)> acos(12389/11811 - (17592186044416*(3937*sin(thCerc) - > 20000*AE*sin(alpha))^2)/390625)

If you just want to display approximations to the numeric values without substituting in for the symbolic variables, use VPA.